SSV-25260, SSV-25279 Import the corrupted pool from backup and reconstructed the primary (Cherry-Pick) #108
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…tructed the primary (#104) * Manually picked the changes from OpenZFS to import from the backup if the primary is corrupted by Windows2025 * SSV-25279 , during import rewriting the corrupted primary partition info with 128 partition to fix the add disk failure * added log and handled error case (cherry picked from commit 081749a)
arun-kv
approved these changes
Sep 12, 2025
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zpool import: reconstruct corrupted primary GPT from backup
On Windows 2025, zpool import can fail if the primary EFI/GPT partition table has been corrupted by OS. In such cases, the
import path is updated to detect the corruption and fall back to the backup GPT.
The code now:
Reads GPT information from the backup when primary shows corruption.
Reconstructs the primary GPT with the correct partition style.
Rewrites the primary GPT on disk and proceeds with import.
This allows zpools with corrupted primary GPT labels to be imported successfully without data loss.
Jira's done : SSV-25260, SSV-25279